الفهرس 
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Abstract
The current study was carried out during two successive seasons 2017/18 and 2018/19 at the nursery of pomology department, agriculture faculty, Damietta university, Damietta governorate, Egypt, to evaluate six strains (genotypes) that selected from local peach (Prunus persica L.) Mit-Ghamr against root-knot nematodes (Meloidogyne incognita) infection. These local genotypes namely Sultani (early, medium, late maturity), Mawy, Fark and Neely.
The following data were recorded: Nematode parameters including number of galls and egg masses in root system, number of Second stage juveniles in soil, root system galled in root system, reproductive factor, total damage index. Morphological parameters including length of seedlings (cm), leaf area (cm2), root system growth coefficient. Physiological and biochemical studies including leaf pigments total chlorophyll and carotenoids (µg/cm2 fresh weight) in leaves, total phenols (mg/g DW), proline (mg/g DW), soluble carbohydrates (mg/g DW) and macro elements nitrogen, phosphorous and potassium in leaves and roots.
CONCLUSION
Based on the previous results and within the framework of sustainable agricultural development, it is recommended to use any of the Mit-ghamr peach genotypes (MA, SE and N) that recorded different degrees of resistance to root-knot nematodes M. incognita ranging from highly resistant and resistant respectively in the production of peach rootstock for grafting on them in order to obtain peach seedlings used in establishing new farms to avoid damage to root-knot nematode infection on tree growth and yield. With avoiding the use of both genotypes (SL, SM and F) of Mit-ghamr peach.